REVIEWS. 551 









or organic units, at every stage of its development. These gemmules 
are conveyed from the parents to the embryo through the medium of 
e spe e. 
at corresponding ages, is rea 
capable only of producing cells like those from which they were de- 
of these would not be developed but lie dormant in the organization, 
though still transmitted from parent to child, until in some remote indi- 
_ Vidual they would find the proper opportunity for development, and pro- 
While t heory appears to satisfy nearly all the 
tain varieties of plants can be propagated by buds, but revert in the 
_ Seedling, this occurring especially with hybrids, and “certain plants with 
ariegated leaves, phloxes with striped flowers, barberries with seedless 
it, can all be securely propagated by the buds or cuttings; but the 
d from 
character, and revert to their former condition.” 
t is the misfortune of a science in the transition stage of its history 
came into being. : 
“S yet, all attempts to produce living beings, of even the lowest org 
ation, from inorganic compounds have failed, and in all cases where spon- 
eT apes i Monads, etc., 
ani- 
Mbjecteq to any heat short of absolute combustion, is capable of convey- 

_ “Word on the Origin of Life, By Protessor J. D. Dana, Silliman’s Journal, May 1866. 

